Comparative and Superlative Adjectives and Adverbs

The new printer works _______ our previous model.

• more efficient than

• more efficiently than

• more efficiently

• the most efficient

Our portable speaker has ____ design in the market.

• the most user-friendly

• the more user-friendly

• most user-friendly

• a most user-friendly

In my opinion, Samsung is ____ Huawei.

• reliable than

• more reliable

• more reliable than

• more reliably than

The iPhone is ____, but the Xiaomi charges faster.

• most expensive

• more expensive than

• expensiver

• more expensive

Duolingo has been ____ other language learning apps so far.

• less successful

• more successful than

• more successful

• the most successfully